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A rod can rotate in a horizontal plane a...

A rod can rotate in a horizontal plane about its one end. A bead which can move along the rod is placed at certain distance from the axis or rotation. The bead does not to friction. The rod has a constant angular acceleration


A. the normal reaction on the bead will be constant h magnitude and direction both
B. the magnitude of the normal reaction on the bead will be variable
C. the magnitude of friction force on the bead will be constant
D. the magnitude of friction force on the bead will be variable

A

the normal reaction on the bead will be constant h magnitude and direction both

B

the magnitude of the normal reaction on the bead will be variable

C

the magnitude of friction force on the bead will be constant

D

the magnitude of friction force on the bead will be variable

Text Solution

Verified by Experts

The correct Answer is:
D
due to `alpha, omega` is increasing
to overcome centripetal force `m omega^(2) r` the friction force will be variable
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